1
|
Lin PC, Li JY, Chen HJ, Lin K, Chen MJ, Lin KM, Lin HC. Indirect Enhancement of ALD Thin-Film Properties Induced by the ECAP Modification of an As-Extruded Mg-Ca Alloy. MICROMACHINES 2024; 15:1006. [PMID: 39203657 PMCID: PMC11356065 DOI: 10.3390/mi15081006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2024] [Revised: 07/29/2024] [Accepted: 07/30/2024] [Indexed: 09/03/2024]
Abstract
The purpose of this study is to investigate the indirect effects on the properties of ZrO2 films deposited by atomic layer deposition (ALD) when an Mg-Ca alloy is modified through equal-channel angular pressing (ECAP) following extrusion. The study aims to understand how the increase in CaO content in the native oxide layer of the Mg-Ca alloy influences the crystallinity and defect density of the ZrO2 film. Consequently, the corrosion protection performance of the ZrO2 film is enhanced by 1.2 to 1.5 times. A reduction in the anti-scratch property of the ZrO2 film was also observed, with a critical load reduction of 34 μN. This research provides a detailed analysis of the modifications induced by ECAP on the as-extruded Mg-Ca alloy and its subsequent impact on the properties of the ZrO2 film.
Collapse
Affiliation(s)
- Pi-Chen Lin
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106319, Taiwan; (P.-C.L.); (J.-Y.L.); (H.-J.C.); (K.L.); (M.-J.C.)
| | - Jun-Yu Li
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106319, Taiwan; (P.-C.L.); (J.-Y.L.); (H.-J.C.); (K.L.); (M.-J.C.)
| | - Hou-Jen Chen
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106319, Taiwan; (P.-C.L.); (J.-Y.L.); (H.-J.C.); (K.L.); (M.-J.C.)
| | - Kaifan Lin
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106319, Taiwan; (P.-C.L.); (J.-Y.L.); (H.-J.C.); (K.L.); (M.-J.C.)
| | - Miin-Jang Chen
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106319, Taiwan; (P.-C.L.); (J.-Y.L.); (H.-J.C.); (K.L.); (M.-J.C.)
| | - Kun-Ming Lin
- Department of Materials Science and Engineering, Feng Chia University, Taichung 407301, Taiwan;
| | - Hsin-Chih Lin
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106319, Taiwan; (P.-C.L.); (J.-Y.L.); (H.-J.C.); (K.L.); (M.-J.C.)
| |
Collapse
|
2
|
Jeong BJ, Lee B, Choi KH, Sung D, Ghods S, Lee J, Jeon J, Cho S, Lee SH, Kim BJ, Kim SI, Huh J, Yu HK, Lee JH, Choi JY. Controlled Bipolar Doping of One-Dimensional van der Waals Nb 2Pd 3Se 8. NANO LETTERS 2023. [PMID: 37099317 DOI: 10.1021/acs.nanolett.3c00159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Tailoring the electrical properties of one-dimensional (1D) van der Waals (vdW) materials is desirable for their applications toward electronic devices by exploiting their unique characteristics. However, 1D vdW materials have not been extensively investigated for modulation of their electrical properties. Here we control doping levels and types of 1D vdW Nb2Pd3Se8 over a wide energy range by immersion in AuCl3 or β-nicotinamide adenine dinucleotide (NADH) solutions, respectively. Through spectroscopic analyses and electrical characterizations, we confirm that the charges were effectively transferred to Nb2Pd3Se8, and the dopant concentration was adjusted to the immersion time. Furthermore, we make the axial p-n junction of 1D Nb2Pd3Se8 by a selective area p-doping using the AuCl3 solution, which exhibits rectifying behavior with an Iforward/Ireverse of 81 and an ideality factor of 1.2. Our findings could pave the way to more practical and functional electronic devices based on 1D vdW materials.
Collapse
Affiliation(s)
- Byung Joo Jeong
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Bom Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyung Hwan Choi
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Dongchul Sung
- Department of Physics, Graphene Research Institute and GRI-TPC International Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Soheil Ghods
- Department of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Junho Lee
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jiho Jeon
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sooheon Cho
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sang Hoon Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Bum Jun Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seung-Il Kim
- Department of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Joonsuk Huh
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Institute of Quantum Biophysics, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hak Ki Yu
- Department of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Jae-Hyun Lee
- Department of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Jae-Young Choi
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| |
Collapse
|
3
|
Electrochemical Analysis of the Influence of Purines on Copper, Steel and Some Other Metals Corrosion. METALS 2022. [DOI: 10.3390/met12071150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Metals stability and corrosion resistance are very important factors that influence the possibility of their applications. In order to study and foresee the behavior of metals during various applications in all kinds of conditions and media, numerous approaches and techniques are developed and applied. Among those techniques, electrochemical measurements nowadays have a dominant role since they are proved to be highly efficient, reliable, fast, relatively low-cost, and easy regarding the preparation and execution of measurements. Besides that, they also provide quite a good amount of data regarding the effect and the mechanism of the reactions that metals interact in. Metals corrosion is reduced by various methods, one of the most frequently used ones is the application of corrosion inhibitors. Usually, organic compounds are studied as potential corrosion inhibitors, and at the moment the focus is on the effect on the environment. Hence, environmentally friendly and non-toxic inhibitors are important research topics. Purines, since they are the group of bioorganic compounds found in numerous biochemical structures such as DNA and RNA, present a very interesting possible solution and are studied as inhibitors of corrosion for copper, steel, aluminum, etc., as well as for some metal alloys. Data obtained and available up until the present are presented and discussed in this review.
Collapse
|
4
|
Hoare D, Bussooa A, Neale S, Mirzai N, Mercer J. The Future of Cardiovascular Stents: Bioresorbable and Integrated Biosensor Technology. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900856. [PMID: 31637160 PMCID: PMC6794628 DOI: 10.1002/advs.201900856] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/26/2019] [Indexed: 05/15/2023]
Abstract
Cardiovascular disease is the greatest cause of death worldwide. Atherosclerosis is the underlying pathology responsible for two thirds of these deaths. It is the age-dependent process of "furring of the arteries." In many scenarios the disease is caused by poor diet, high blood pressure, and genetic risk factors, and is exacerbated by obesity, diabetes, and sedentary lifestyle. Current pharmacological anti-atherosclerotic modalities still fail to control the disease and improvements in clinical interventions are urgently required. Blocked atherosclerotic arteries are routinely treated in hospitals with an expandable metal stent. However, stented vessels are often silently re-blocked by developing "in-stent restenosis," a wound response, in which the vessel's lumen renarrows by excess proliferation of vascular smooth muscle cells, termed hyperplasia. Herein, the current stent technology and the future of biosensing devices to overcome in-stent restenosis are reviewed. Second, with advances in nanofabrication, new sensing methods and how researchers are investigating ways to integrate biosensors within stents are highlighted. The future of implantable medical devices in the context of the emerging "Internet of Things" and how this will significantly influence future biosensor technology for future generations are also discussed.
Collapse
Affiliation(s)
- Daniel Hoare
- BHF Cardiovascular Research CentreUniversity of GlasgowG12 8TAGlasgowScotland
| | - Anubhav Bussooa
- BHF Cardiovascular Research CentreUniversity of GlasgowG12 8TAGlasgowScotland
| | - Steven Neale
- James Watt South BuildingSchool of EngineeringUniversity of GlasgowG12 8QQGlasgowScotland
| | - Nosrat Mirzai
- Bioelectronics UnitCollege of Medical, Veterinary & Life Sciences (MVLS)University of GlasgowG12 8QQGlasgowScotland
| | - John Mercer
- BHF Cardiovascular Research CentreUniversity of GlasgowG12 8TAGlasgowScotland
| |
Collapse
|